Alert archive / Alabama / Mesoscale Discussions in 2003
Mesoscale Discussion 426
The Storm Prediction Center issued this mesoscale discussion at Apr 7, 2003, 1:51 AM CDT for 5 counties in Alabama. It was in force for 54 min.
The area
The outline as issued.
The facts
- Issued
- Apr 7, 2003, 1:51 AM CDT (06:51 UTC)
- Expired
- Apr 7, 2003, 2:45 AM CDT
- In force
- 54 min
- Issued by
- the Storm Prediction Center
Counties Bullock County, AL, Butler County, AL, Lowndes County, AL, Macon County, AL, Montgomery County, AL
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Birmingham, AL (KBMX), launched 00:00Z, 6.9 hours before the alert went out and 117 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 677 J/kg
- Mixed-layer CIN
- -71 J/kg
- Mixed-layer LCL
- 1007 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 133 m²/s²
- 0-3 km storm-relative helicity
- 175 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.4
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 6, 8:13 PM CDT | Mesoscale Discussion | SPC | Bibb, Chilton, Choctaw, Dallas, Fayette, Greene and 8 more | 2 hr |
| Apr 6, 9:48 PM CDT | Mesoscale Discussion | SPC | Autauga, Chilton, Choctaw, Clarke, Dallas, Hale and 6 more | 87 min |
| Apr 6, 10:15 PM CDT | Tornado Watch | SPC | Autauga, Butler, Choctaw, Clarke, Conecuh, Covington and 10 more | 5 hr |
| Apr 6, 11:39 PM CDT | Mesoscale Discussion | SPC | Autauga, Butler, Choctaw, Clarke, Conecuh, Covington and 11 more | 2 hr |
| Apr 7, 2:55 AM CDT | Tornado Watch | SPC | Autauga, Barbour, Bullock, Chilton, Choctaw, Dallas and 13 more | 4 hr |
| Apr 7, 4:49 AM CDT | Mesoscale Discussion | SPC | Autauga, Chambers, Chilton, Coosa, Dallas, Elmore and 11 more | 3 hr |
| Apr 7, 9:11 AM CDT | Mesoscale Discussion | SPC | Barbour, Coffee, Conecuh, Covington, Crenshaw, Dale and 6 more | 3 hr |
| Apr 7, 9:40 AM CDT | Tornado Watch | SPC | Barbour, Bullock, Macon, Pike, Russell | 5 hr |
| Apr 7, 11:25 AM CDT | Mesoscale Discussion | SPC | Baldwin, Butler, Clarke, Coffee, Conecuh, Covington and 6 more | 3 hr |
| Apr 7, 12:07 PM CDT | Mesoscale Discussion | SPC | Baldwin, Butler, Clarke, Coffee, Conecuh, Covington and 6 more | 113 min |
| Apr 7, 12:22 PM CDT | Mesoscale Discussion | SPC | Baldwin, Butler, Clarke, Coffee, Conecuh, Covington and 6 more | 113 min |
| Apr 7, 3:40 PM CDT | Severe Thunderstorm Watch | SPC | Baldwin, Covington, Escambia, Mobile | 5 hr |
| Apr 7, 5:58 PM CDT | Mesoscale Discussion | SPC | Baldwin, Escambia, Mobile | 2 hr |
Nearby
Mesoscale Discussions in Alabama, 2003Every mesoscale discussion in 2003
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.